package Demo01;

public class StringBuilderDemo01 {
    public static  void main(String[] args) throws  Exception{
        StringBuilder builder = new StringBuilder(30);
        builder.append("edu.yootk.com").insert(0,"李兴华编程训练营：");
        System.out.println(builder.replace(9,25,"www.yootk.com").delete(0,9));
    }
}
